Reaction:

Solid iron oxide (Fe₂O₃) reacts with hydrogen gas (H₂) to form solid iron (Fe) and liquid water (H₂O).

Chemical Equation:

Fe₂O₃(s) + 3H₂(g) → 2Fe(s) + 3H₂O(l)

Explanation:

* Iron oxide is a common rust.

* Hydrogen gas is a flammable gas.

* Iron is a solid metal.

* Water is a liquid.

Key Points:

* This reaction is an example of a reduction-oxidation (redox) reaction.

* Iron oxide is being reduced (gaining electrons) to form iron.

* Hydrogen is being oxidized (losing electrons) to form water.

* This reaction is also an exothermic reaction, meaning it releases heat.

Let me know if you have any more questions about this reaction or chemistry!